RE: ISDN backup for IS-IS

From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Thu Jun 17 2004 - 12:37:29 GMT-3


Tom,

        It's actually arbitrary. Since you are not actually using CMNP
or CLNP (protocols in the CLNS stack, analogous to TCP and UDP
respectively) you don't need a unicast mapping for NET address. IS-IS
routing protocol advertisements (CLNS_IS encapsulation, LSAP/DSAP
0xFEFE) are actually sent as CLNS broadcasts. Therefore as long as you
include the broadcast keyword on the mapping it doesn't matter what NET
address you put in.

        Try the configuration like this and see what the difference is:

R1:
int bri0
 dialer map clns 49.0200.0002.0002.0002.00 ...

R1:
int bri0
 dialer map clns 00 ...

R1:
int bri0
 dialer map clns 12.3456.7890 ...

HTH,

Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com

Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705

> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Patrick Torney
> Sent: Thursday, June 17, 2004 10:20 AM
> To: Tomasz Siwiarek; ccielab@groupstudy.com
> Subject: Re: ISDN backup for IS-IS
>
> I think it's this:
>
> R1
> router isis
> net 49.0100.0001.0001.0001.00
>
>
> R2
> router isis
> net 49.0200.0002.0002.0002.00
>
> On R1 and R2, to which clns adres should I map?
>
> R1
> int bri0
> dialer map clns 49.0200.0002.0002.0002.00 ...
>
> R2
> int bri0
> dialer map clns 49.0100.0001.0001.0001.00 ....
>
> ----- Original Message -----
> From: "Tomasz Siwiarek" <siwiarek@poczta.onet.pl>
> To: <ccielab@groupstudy.com>
> Sent: Thursday, June 17, 2004 10:06 AM
> Subject: ISDN backup for IS-IS
>
>
> > My problem is :
> >
> > R1
> > router isis
> > net 49.0100.0001.0001.0001.00
> >
> >
> > R2
> > router isis
> > net 49.0200.0002.0002.0002.00
> >
> > On R1 and R2, to which clns adres should I map?
> >
> > R1
> > int bri0
> > dialer map clns (which adres should I type here)?
> >
> > R2
> > int bri0
> > dialer map clns (which adres should I type here)?
> >
> >
> > Thank you.
> >
> >



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